and has the tape recordings to prove it. >> and professor on how the clintons had their relationship benefit their political ambitions. this is continuing four days of nonfiction books and authors through new year's day on c- span's booktv. >> neil armstrong, the first person to walk on the moon, died last summer. in september, a memorial service was held. the head of nasa, charles bolden, led the service, which was held at the washington national cathedral. this is about 25 minutes. [applause] >> we choose to go to the moon in this decade and other things not because they are easy but because they are hard, because that gold will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one that we are willing to postpone, and one that we intend to win, and the others, too. [applause] many years ago, the grayish -- the great british explorer, george melroy, who was to.on mount everest, was asked what he would want to climate, and he said because it is there, and, well, space is there, and we are going to climate,